/Engine/Plugins/Experimental/Mutable/Source/CustomizableObjectEditor/Classes/MuCOE/Nodes/CustomizableObjectNodeMaterial.h
Get the Vector pin for the given Material Vector Parameter. Not all parameters have pin.
Can return nullptr.
const [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * GetParameterPin ( EMaterialParameterType Type, int32 ParameterIndex ) const